Misc divvy settings

- Disable divvy automatic updates
- Enable the divvy global hotkey
- Use cmd+shift+space as the divvy hotkey (keycode)
- Use cmd+shift+space as the divvy hotkey (modifiers)
- Show divvy in the menubar
- Do not keep panel open until dismissed
- Do not cycle between screens when using shortcuts
- Do not enable animations
Handlers to restart divvy when appropriate
Add the divvy task to the system_settings role
Merge pull request #7 from marvinpinto/divvy-settings

Divvy settings